@misc{indiciaea408b95d0b14,
  title = {The Barber coal field, Johnson county, Wyoming},
  author = {C. H. Wegemann},
  year = {1913},
  doi = {10.3133/b531i},
  url = {https://pubs.usgs.gov/publication/b531I},
  note = {Source identifier: b531I}
}